//
// DotNetNuke - http://www.dotnetnuke.com
// Copyright (c) 2002-2010
// by Perpetual Motion Interactive Systems Inc. ( http://www.perpetualmotion.ca )
//
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
// documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
// to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all copies or substantial portions 
// of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
// TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
// DEALINGS IN THE SOFTWARE.
//

using System;
using System.IO;
namespace DotNetNuke.HttpModules.Compression
{
	public abstract class HttpOutputFilter : Stream
	{
		private Stream _sink;
		protected HttpOutputFilter(Stream baseStream)
		{
			_sink = baseStream;
		}
		protected Stream BaseStream {
			get { return _sink; }
		}
		public override bool CanRead {
			get { return false; }
		}
		public override bool CanSeek {
			get { return false; }
		}
		public override bool CanWrite {
			get { return _sink.CanWrite; }
		}
		public override long Length {
			get {
				throw new NotSupportedException();
			}
		}
		public override long Position {
			get {
				throw new NotSupportedException();
			}
			set {
				throw new NotSupportedException();
			}
		}
		public override long Seek(long offset, SeekOrigin direction)
		{
			throw new NotSupportedException();
		}
		public override void SetLength(long length)
		{
			throw new NotSupportedException();
		}
		public override void Close()
		{
			_sink.Close();
		}
		public override void Flush()
		{
			_sink.Flush();
		}
		public override int Read(byte[] buffer, int offset, int count)
		{
			throw new NotSupportedException();
		}
	}
}
